Acquisitions - Additional Information (Details) - USD ($)	12 Months Ended
	Jan. 31, 2017	Jan. 31, 2016	Jan. 31, 2015
Business Acquisition [Line Items]
Amortization of intangible assets	$ 348,000	$ 393,000	$ 306,000
Talkatone, Inc.
Business Acquisition [Line Items]
Total consideration			2,264,000
Earn-out payments, fair market value			1,000,000
Earn-out payments, gross amount			2,200,000
Acquisition, transaction costs			12,000
Earn-out consideration, cash paid	$ 100,000	$ 700,000
Earn-out consideration, shares issued	26,375	49,159
Amortization of intangible assets	$ 300,000	$ 400,000	$ 200,000